drachma vs apothecaries' unit

drachma and apothecaries' unit both are nouns.

Word	Noun	Adjective	Verb	Adverb
drachma	Yes	No	No	No
apothecaries' unit	Yes	No	No	No

As nouns, apothecaries' unit is a hypernym of drachma; that is, apothecaries' unit is a word with a broader meaning than drachma:

drachma: a unit of apothecary weight equal to an eighth of an ounce or to 60 grains
apothecaries' unit: any weight unit used in pharmacy; an ounce is equal to 480 grains and a pound is equal to 12 ounces

Other hypernyms of drachma include apothecaries' weight.

drachma (noun)	apothecaries' unit (noun)
formerly the basic unit of money in Greece	any weight unit used in pharmacy; an ounce is equal to 480 grains and a pound is equal to 12 ounces
a unit of apothecary weight equal to an eighth of an ounce or to 60 grains